I have an aftermarket kenwood nav unit and I want to add an ipod cable. Would it be easier/cheaper for me to install it myself or to go to best buy and have them do it for me. If I do it myself how do I go about doing it? thanks

I feel like kenwood would have an iPod cable that hooks directly into the back of the head unit so all that would mean for install is taking out the head unit but I'm not really sure. That's just my gut instinct